Hi @fatony
It's highly unhealthy to tie your purpose in life to only one idea, because then you will take everything that goes against it like a personal affront.
You will also tend to focus only on the bad thing or what you perceive to be bad. It becomes like a cult, and then you try to excommunicate others who doesn't follow it.
We could of course only work for SuperTuxKart until we all starve to death and then the project would stop and I don't think it would be beneficial in the long run.
At the end of the day, we have expenses (hosting, etc), we have marketing (printing posters, etc) and all that cost money. And we don't even talk about eating (because we all have another work).
You have also to understand nothing can be free. If it seems to be free it's because someone else is paying in this case, we the developers use our free time to work on the project. We invest energy.
We have tracks that are only available to people who donate and to be more precise it's only the track (the layout) who is under such license, because all other objects are already included in the core game, which means you can create your own track with the same objects we used for the donator package, you can even try to recreate it.
The package is also totally optional you don't need it in order to run SuperTuxKart but even that wouldn't be an issue according to Richard Stallman
In my view, nonfree licenses that permit sharing are ok for works of art/entertainment, or that present some party's viewpoint (such as this article itself). Those works aren't meant for doing a practical job, so the argument about the users' control does not apply. Thus, I do not object if they are published with the CC-BY-NC-ND license, which allows only noncommercial redistribution of exact copies
Source
A lot of other projects do something similar, like
FrogattoWhy not taking a break from all of that, to stop focusing your whole life about the free software movement and to do other activities, like:
Explore the world around you, visit museums, historical landmarks, or start a sport like Judo or anything else, you could learn how to do delicious cakes.
But you should have something else, not related to Open Source software, something that allows you a break.
Life isn't only software!